Drop-hammer



H. TERHUNE.

DROP HAMMER.

APPLICATION FILED OCT. 20, 1919.

Patented Aug. 10, 1920.

///z i N 44 "g i Ig-E i 39 3 '50 40 51 41 UNITED STATES PATENT OFFICE.

HONVABD TERI-IUNE, OF EAST CLEVELAND, OHIO, AS-SIGNOB. TO THE KILBY MANU- FACTURING COMPANY, OF CLEVELAND, OHIO, A CORPORATION OF OHIO.

DROP-HAMMER.

Application filed October 20, 1919.

To all whom it may concern:

Be it known that I, HOWARD TnRHUNE, a citizen of the -United States, residing at East Cleveland, in the county of Guyahoga and State of Ohio, have invented a certain new and useful Improvement in Drop-Hammers, of which the following is a full, clear, and exact description, reference being had to the accompanying drawings.

This invention relates to drop-hammers, and especially to those of the board type wherein the hammer head tion rolls acting upon a board and subsequently allowed to drop by displacing the rolls out of contact therewith. The objects of the present invention are the provision of a new and simplified arrangement for supporting, adjusting and displacing these rolls; the provision of means for operating these rolls which shall be less subject to strain and breakage than previous devices and which in the event of such breakage shall be less liable either to fall upon and injure the operator or to fall into and interfere with the operation of the machine; the provision of a construction whereby both ends of the rolls may be adjusted simultaneously and whereby wear upon the bearings is decreased and also made uniform; the provision of new and improved arrangements for lubricating the roll-shafts while further objects and advantages of the invention will become apparent as the description proceeds.

In the drawings accompanying and forniing a part of this application, I have illustrated one embodiment of my invention although it will inventive idea can be utilized in a great number of physical constructions. In these drawings, Figure 1 is a front elevation of the upper part of a board drop-hammer containing my improvements; Fig. 2 is a vertical sectional view corresponding to the line 2-2 of Fig. 1; Fig. 3 is a perspective view of a part of the rolls and their bearing and operating means; and Fig. 1 is a longitudinal, sectional view through one of the eccentric rocker-members.

Describing by reference characters the parts shown in the drawings 11 represent the two uprights, having parallel guides 2-2 upon their adjacent faces, and 3 repre- Specification of Letters Patent.

is raised by TIlC be understood that myv Patented A11 10, 1920.

Serial No. 331,890.

sents the hammer which slides between said guides. The anvil or base of the frame is not illustrated since any suitable or desired construction can be employed. Seated upon the top of the uprights is the head -1 having at each side theupwardly projecting hollow ears 5, one above each upright. The top of each ear is formed with two parallel spaced horizontal bearings 66 for the reception of rocker-members 7, 8, respectively, the mid-portion of each bearing being cut away for the reception of the enlargements 9, 10, respectively, with which said rocker-members are formed. These rockers are held in their bearings by bearing caps 1212. Each of the ears 55 is provided with similar bearings and rocker-members so that a description of one will serve for both.

Eccentrically mounted in each end of each rocker-member is a bushing 1 said bushing being spaced upon opposite sides of the corresponding enlargement, and such enlargement being hollowed out to form a lubricant chamber 15. Journaled in the bushings'1a14c of the rocker-members are the shafts 17, 18, respectively, which are provided in the space between the two ears 55 with the rollers 19, 20, respectively, while the outer ends of said shafts are provided withthe belt pulleys 21, 22, respectively, which are rotated in opposite directions from any suitable source of power. Secured to the hammer 3 is a vertical board 24 which passes upwardly between the two rollers in the usual manner.

Parallel to each of the shafts 17 and 18 I. provide rock-shafts 80, 31, respectively, journaled to the head, in any suitable manner as by means of bearings 32 carried by the ears 55. To each end of each rockshaft Isecure rigid an arm 33 connected by links 34L with a depending extension 35 carried by the adjacent rocker-members. lVith this construction it will be seen that by rocking the shafts 30 and 31 the corresponding rocker-members 7, S, can be moved in their bearings which will in turn bring the rollers 19, 20 nearer to or farther from each other because of the eccentricity of their bearings. One of the rock-shafts, as 30, is employed for regulating the operation of the machine, while the other, as 31, is employed for adjusting the same to com- V a trigger 41 carried by the upright 1, and

here shown as mounted in the guide 38. the hammer 3 is formed witha cam portion 42 adapted to strikethe end of this trigger when the hammer falls and displace the same laterally so as tojrelease thefinger 40 and allow the bar 37 to drop by its own weight thereby rocking the shaft 30 and consequently the members 7 andmoving the rollar 19 into contact with friction bar.37, therebyrocking the shaft 30 in the opposite direction and withdrawing the roller 19 outof contact with the board so that the hammer is e reciprocation of the hammer is thereby rendered continuous until stopped by other means not shown herein because not necessary to an understanding of the present invention; 1

The second rock shaft 31 is also provided in line lateral justing rod 49 whose opposite end is secured to a suitable part 50 by means of clamp nuts 5l51. This deviceis only touched as it is nece'ssaryto adjust the machine for wear.

By the construction here set forth it will be seen that the two sides of the device are identical; the rock shafts and their appurtenances and levers are the same on both sides of the machine; the friction-bar 37 and adjusting-rod 48 are straight and are located allowed to drop.

breakage; the construction affords long bearings for the shafts and a. uniform and parallel adjustment of the rollers toward and from each other at all times; while reliable lubrication of the moving parts is provided adjustment capacity,

compensation can be effected by lengthening or shortening the links 34 or employing different holes therein.

While I have described my improvements in detail and pointed out at length the specific construction which I now prefer, I do not restrict myself to the details of construction herein set forth except as recited in the claims hereto annexed or rendered necessary by the prior state of the art.

aving thus described my invention, what I claim is 1. In a drop hammer of the board type, the combination with the uprights and horizontal bearings located above the same, of rocker-members mounted ried bysaid rocker-members eccentrically of said first bearings. the shaft bearings of the opposed rocker-members being inalinement, a rock-shaft parallel to said shaft bearings, an arm carried by said rock shaft adjacent toone of said uprights, a vertically movable friction bar secured to said arm and depending along said upright, a hammer mov:

able along said uprights, operative connecand bar, and operative connections between said rockshaft and rocker-members whereby the latter will be rotated simultaneously in their bearings upon the movement of the latter.

2. In a drop hammerof the board type, the combination of a head having spaced ears and alined bearlngs ,in said ears, of

to said first bearings, a rock-shaft journ'aled to said head parallel to said first bearings, an arm carried by said rockshaft, a straight friction bar depending from said arm, and operative connections between said rockshaft and each of said rocker-membersj 3. Ina drop hammer of the'combination of a head having a pair of spaced bearings and a pair of parallel rockermembers journaled therein, opposite rockermembers beingin alinement and each rocke1'-' member having an eccentric shaft alined with the similar bearing of the opposite rocker-member, a pair of rock-shafts journaled to said head parallel to said rockermembers, operative connections between each rook-shaft and alined rocker-members, a lateral arm on each rock-shaft, and a depending rod attached to each arm.

In a drop hammer of the board type, the combination of a head having a pair of spaced bearings and a pair of parallel rocker-members journaled therein, opposite rocker-members being in alinement and each rocker-member having an eccentric shaft bearing alined with the similar bearing of the opposite rocker member, a pair of rocks afts journaled to said head one on each side and parallel to said rocker-members,

bearing the board type,

- said head parallel to spaced alined bearings,

operative connections between each shaft and alined rocker-members, an arm carried by each rock-shaft, a friction bar depending from one of said arms, and an adjusting member secured to the other of said arms.

5. In a drop hammer of the board type, the combination of a head having a pair of spaced hollow ears and discontinuous alined bearings carried thereby, the bearings of each ear being in alinement with the similar bearings of the opposite ear, a rocker-member journaled in each ear and having alateral projection located between the bearing sections thereof, shaft bearings carried by the rocker-members eccentrically of said first bearings, a portion of such shaft bearing being located on each side of the corresponding projection and the shaft-bearings of opposite rocker-members being in alinement, a rock-shaft journaled to said head parallel to said first bearing, arms carried by said'rock shaft, links connecting said arms with said projections, respectively, and means for operating said rock shaft.

6. In a drop hammer of the board type, the combination of a head having a pair of a pair of rockermembers journaled one in each bearing and each having an operating arm, an eccentric shaft-bearing carried by each rocker-member in line with the similar bearing of the opposite member, a rock shaft journaled to said bearings and having spaced arms, links connecting the shaftarms with the first-mentioned arms, and means for moving and holding said rockshaft.

7. In a drop hammer of the board type, the combination of a head having four alined, longitudinally spaced, horizontal,

bearing portions, a pair of rocker-members journaled in the two outermost bearing portions and each having a hollow enlargement located between the two bearing portions in which it is mounted, shaft-bearings carried by each rocker-member eccentrically of said first bearings and located upon opposite sides of said enlargement, and means for rotating said rocker-members simultaneously.

8. In a drop hammer of the board type, a rocker-member having two cylindrical portions separated by a hollow enlargement, a shaft bearing located inside each cylindrical portion parallel thereto and eccentric thereof, the cavity in said enlargement constituting a lubricant chamber and the shaft bearings opening into opposite sides thereof, and means carried by the exterior of said enlargement whereby said member may be rocked.

9. In a drop hammer of the board type, a rocker-member having two cylindrical portions separated by a hollow enlargement, a shaft bearing located inside each cylindrical portion parallel thereto and eccentric thereof, the cavity in said enlargement constituting a lubricant chamber and the shaft bearings opening into opposite sides thereof, an operating shaft journaled in said last bearings, a chain loosely surrounding said shaft inside said cavity for supplying oil thereto, and a link connection carried by said member for rocking the same.

In testimony whereof, I hereunto affix my signature in the presence of two witnesses.-

HOVVARD TERHUNE.

lVitnesses GEORGE P. ZIEBERT, L. A. Bunsen. 

